REPOKT OF THE AS8I8TANT ZOOLOGIST 



647 



Note 10. 



Anodonta Ferussaciana, Lea. — It is probable that Anodonta sub- 

 cylindracea Lea, is a synonym. Ferussaciana is usually applied to 

 western specimens and sidwylindracea to eastern specimens. 



Note 11 . 



Bithinia tentaculata, Linn. — This is an introduced European spe- 

 cies. Its occurrence in this country was first recorded by Rev. W. M # 

 Beauchamp, he having found specimens of it at Oswego, in 1879. The 

 State Museum has several hundred specimens collected by Dr. Charles 

 E. Beecher in the Champlain canal in 1879. Dr. Beecher informs me 

 that he found three or four specimens in the same place in 1878. 



Note 12. 



Vivipara contectoides, W. G. B. — This species was colonized in 

 the Erie canal at Mohawk by Dr. James Lewis in 1868. It has spread 

 through the canal and is now one of the most abundant shells in the 

 vicinity of Albany. 



Note 13. 



Lioplax subcarinata, Say. — Aldrich's list contains no mention of 

 this species and it is probable that the species did not inhabit this 

 neighborhood when Aldrich prepared his list. Dr. Charles E. Beecher 

 informs me that he collected some specimens at the mouth of the Nor- 

 man's Kill in 1878. Dr. Lewis, to whom the specimens were shown, said 

 that in all probability the species had migrated into the Hudson from 

 the Delaware, through the Delaware and Hudson canal. At the 

 present time the species is abundant in this vicinity. 



Note 14. 



Planorbis catnpanulatus, Say. — So far as known to me this species 

 does not occur in the living state in this vicinity. It is quite abundant 

 in the fossil state, in a marl bed in Greene county, about fifteen miles 

 south of Albany. 



Note 15. 



Lima.c maximus, Linn , Limax flaous, Linn., Limax agrestis, 

 Linn. — These three species of slugs have been introduced into this 

 country from Europe. 



